US2025115025A1PendingUtilityA1
Aerogel Composite
Est. expiryOct 5, 2043(~17.2 yrs left)· nominal 20-yr term from priority
B32B 2262/101B32B 2266/126B32B 2307/304D10B 2101/06D06M 2400/02D06M 2101/02B32B 5/18C01B 33/1585D06M 11/79B32B 2307/7376B32B 2307/54B32B 2307/72B32B 2266/102B32B 5/245
78
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Claims
Abstract
An aerogel composite having an excellent level of thermal insulation even when compressed and deformed under application of pressure resulting from various causes is provided. The aerogel composite can be used as a thermal insulation material for batteries, electronic devices, automobiles, industrial equipment, structures, or the like.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . An aerogel composite comprising a fiber substrate; and an aerogel containing a plurality of open pores, wherein the aerogel includes a plurality of silica aerogel particles,
wherein the silica aerogel particles comprise secondary particles in which primary particles are aggregated, wherein, in a small angle X-ray scattering (SAXS) graph showing a log plot of scattering intensity versus wave number for the silica aerogel particles, a slope in a wave number in a range of 0.015/Å to 0.035/Å is from −2.80 to −2.20.
2 . The aerogel composite of claim 1 , wherein the primary particles have an average particle diameter of greater than 0 nm and less than or equal to 10 nm.
3 . The aerogel composite of claim 1 , wherein the secondary particles have an average particle diameter of 5 nm to 2000 nm.
4 . The aerogel composite of claim 1 , wherein the aerogel comprises pores having a pore diameter of 30 nm or less at 25% or greater of a pore volume of a skeletal structure of the aerogel.
5 . The aerogel composite of claim 1 , wherein the aerogel comprises pores having a pore diameter of greater than 30 nm at 50% or greater of a pore volume of a skeletal structure of the aerogel.
6 . The aerogel composite of claim 1 , wherein a porosity of the aerogel is 80% or greater.
7 . The aerogel composite of claim 1 , wherein the small angle X-ray scattering graph is a graph derived from small angle X-ray diffraction analysis of the silica aerogel particles separated from the aerogel composite.
8 . The aerogel composite of claim 1 , wherein the small angle X-ray scattering graph is a graph derived from small angle X-ray diffraction analysis of the silica aerogel particles in the aerogel composite.
9 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that when the aerogel composite is compressed under application of a pressure at each of 3 bar, 9 bar, and 24 bar in a transverse direction with respect to a cross-section of the aerogel composite, a heat transmission coefficient of the aerogel composite after the compression is equal to or less than 1.8 times the heat transmission coefficient before the compression along the transverse direction.
10 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that a heat transmission coefficient of the aerogel composite before and after compression satisfies Equation 4 below:
{
(
Heat
transmission
coefficient
(
a
)
before
and
after
compression
-
Average
value
(
b
)
of
heat
transmission
coefficients
before
and
after
compression
)
}
=
(
Average
value
(
b
)
of
heat
transmission
coefficients
before
and
after
compression
)
XA
,
[
Equation
4
]
wherein the heat transmission coefficient (a) before and after compression indicates the heat transmission coefficient of the aerogel composite obtained after compression under application of 0 bar, 3 bar, 9 bar, or 24 bar in a transverse direction with respect to a cross-section of the aerogel composite,
the average value (b) of heat transmission coefficients before and after compression is an average value of the heat transmission coefficients of the aerogel composite under no application of pressure, and heat transmission coefficients of the aerogel composite obtained after compression with a pressure value at each of 3 bar, 9 bar, and 24 bar in a transverse direction with respect to a cross-section of the aerogel composite, and
A is a number ranging from −0.40 to +0.40.
11 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that a heat transmission coefficient of the aerogel composite before and after compression satisfies Equation 4 below:
{
(
Heat
transmission
coefficient
(
a
)
before
and
after
compression
-
Average
value
(
b
)
of
heat
transmission
coefficients
before
and
after
compression
)
}
=
(
Average
value
(
b
)
of
heat
transmission
coefficients
before
and
after
compression
)
XA
,
[
Equation
4
]
wherein the heat transmission coefficient (a) before and after compression is a heat transmission coefficient of the aerogel composite obtained after compression under application of 0 bar, 3 bar, or 9 bar in a transverse direction with respect to a cross-section of the aerogel composite,
the average value (b) of heat transmission coefficients before and after compression is an average value of the heat transmission coefficient of the aerogel composite under no application of pressure, and heat transmission coefficients of the aerogel composite obtained after compression with a pressure value at each of 3 bar, and 9 bar in a transverse direction with respect to a cross-section of the aerogel composite, and
A is a number ranging from −0.23 to +0.23.
12 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that a heat transmission coefficient of the aerogel composite obtained after compression with a pressure at each of 3 bar, 9 bar, and 24 bar in a transverse direction with respect to a cross-section of the aerogel composite satisfies Equation 5 below:
(
Heat
transmission
coefficient
(
c
)
after
compression
-
Average
value
(
d
)
of
heat
transmission
coefficients
after
compression
)
=
(
Average
value
(
d
)
of
heat
transmission
coefficients
after
compression
)
XB
,
[
Equation
5
]
wherein the heat transmission coefficient (c) after compression is the heat transmission coefficient of the aerogel composite obtained after compression with a pressure of 3 bar, 9 bar, or 24 bar in the transverse direction with respect to the cross-section of the aerogel composite,
the average value (d) of heat transmission coefficients after compression is an average value of the heat transmission coefficients of the aerogel composite obtained after compression with a pressure of each of 3 bar, 9 bar, and 24 bar in the transverse direction with respect to the cross-section of the aerogel composite, and
B is a number ranging from −0.30 to +0.30.
13 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that a change rate (C) of heat transmission coefficient of the aerogel composite after compression per unit application pressure represented by Equation 6 below is a number ranging from −0.15 to +0.15:
C
=
(
heat
transmission
coefficient
after
compression
with
a
pressure
of
x
-
heat
transmission
coefficient
after
compression
with
a
pressure
of
y
)
/
(
x
-
y
)
,
[
Equation
6
]
wherein x and y are each independently 3 bar or 24 bar, but are different pressure values.
14 . The aerogel composite of claim 1 , wherein the aerogel composite is configured so that when the aerogel composite is under application of a pressure at each of 3 bar, 9 bar, and 24 bar in a transverse direction with respect to a cross-section of the aerogel composite, a compression recovery rate represented by Equation 2 below is 60% or greater:
Compression
recovery
rate
(
%
)
=
{
(
Cross
-
sectional
thickness
of
aerogel
composite
after
compression
)
/
(
Cross
-
sectional
thickness
of
aerogel
composite
before
compression
)
}
×
100.
[
Equation
2
]
15 . The aerogel composite of claim 1 , wherein the aerogel comprises silica, methylsilylated silica, dimethylsilylated silica, trimethylsilylated silica, or a mixture thereof.
16 . The aerogel composite of claim 1 , wherein the aerogel composite has a density ranging from 0.05 to 0.50 g/cm 3 .
17 . A thermal insulation member comprising the aerogel composite of claim 1 .
18 . The thermal insulation member of claim 17 , further comprising a support member positioned on at least one of an upper surface or a lower surface of the aerogel composite.Join the waitlist — get patent alerts
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